Spreizwerkzeug und Verfahren zur Herstellung eines Hohiringes under Verwedung einer Spreizvorrichtung

ABSTRACT

A spreading tool ( 4 ) for widening a jewelry ring, in particular for pressing an inner ring portion ( 24 ) into an outer ring portion ( 26 ) of a hollow ring ( 22 ), has a plurality of spreading jaws ( 10 ), the insides ( 48 ) of which bound a receiving space ( 50 ), into which a spreading body ( 52 ) can be inserted for spreading open the spreading jaws ( 10 ), and which form on the outsides ( 34 ) thereof a plurality of coaxial ring receptacles ( 32 ) each being bounded radially inwardly by circumferentially disposed wall sections ( 36 ) of the spreading jaws ( 10 ). The ring receptacles ( 32 ) have diameters (Dn) that decrease relative to one another toward a free end ( 40 ) of the spreading jaws ( 10 ), characterized in that the spreading jaws ( 10 ) bound the ring receptacles ( 32 ) on both sides also in the direction of a main axis (A).

The invention relates to a spreading tool for widening a jewelry ring, such as in particular for pressing an inner ring portion into an outer ring portion when producing a hollow ring, according to the preamble of claim 1, a spreading device having such a spreading tool, and a method for producing a hollow ring using such a spreading device, and such a hollow ring. The spreading tool has a plurality of spreading jaws, the insides of which bound a receiving space, into which a spreading body can be inserted or pressed under pressure, so as to move or spread open radially outwardly the spreading jaws relative to a common main axis. The spreading jaws form on the outsides thereof a plurality of ring receptacles disposed coaxial relative to the main axis, the ring receptacles each being bounded radially inwardly by circumferentially disposed wall sections of the spreading jaws. The ring receptacles each define a diameter located on the inside, the diameters of the ring receptacles becoming incrementally smaller relative to one another toward a free end of the spreading jaws.

From DE 25 20 369, a device for tightening and widening finger rings is known that comprises a spreading sleeve having a plurality of spreading jaws that are separated from one another by slots. On the outside thereof, the spreading sleeve forms a plurality of cylindrical sections, the diameters of which decrease toward a free end and that each serve to receive a ring of corresponding inside diameter that is to be spread open. By urging a cone mandrel against the inside of the spreading sleeve, the spreading jaws are pushed radially outward, so as to spread open a finger ring supported on one of the cylinder sections.

It is a shortcoming in the known spreading device that same, when working on a ring that is rounded on the inside, results in pressure being exerted only in a substantially linear region. After the actual spreading operation, such rings therefore require relatively time-consuming finishing. Moreover, the known spreading device is not suited to allow, for example in producing a multi-part hollow ring, a first ring portion having a non-cylindrical outer surface to be pressed into a second ring portion using uniformly distributed unit pressure.

It is the aim of the invention to avoid in a spreading device of this type the aforementioned shortcomings and to provide a spreading tool that is suited also for working on, or producing, finger rings, such as in particular multi-part hollow rings, that have rounded insides.

This aim is achieved by a spreading tool having the features of claim 1. The spreading jaws form an at least partial boundary of the ring receptacles on both sides in the axial direction with respect to the main axis of the spreading tool. As a result, the ring to be worked on can be supported or subjected to a reshaping force on both sides also in the axial direction. In this way, an application of force that is distributed more uniformly and, where applicable, also across a larger surface area, is made possible even when the inside of a finger ring to be spread open deviates from a cylindrical shape.

In a particularly advantageous embodiment, the ring receptacles are each substantially bounded by adjacently disposed concave grooves that are recessed into each of the circumferentially disposed wall sections. As a result, a substantially full-surface application of pressure onto the rounded inside of a ring to be worked on by means of the spreading tool is possible during the spreading operation. It is advantageous if the concave grooves each have a groove bottom that forms a circular-segment-shaped section in cross section, allowing the inside of the ring that is to be worked on, to be given a shape during the spreading operation that allows the ring to be easily put on and removed.

Advantageously, the circular-segment-shaped section forms a radius of less than 25 mm, and in particular 22 mm, thus ensuring that the finger ring can be easily put on and removed and has a high degree of wearing comfort.

Additionally, it is advantageous if the ring receptacles are bounded by at least six circumferentially disposed spreading jaws. The spreading jaws may be formed either separately or as one piece, in which case they are deformable relative to one another by means of suitably formed slots and are connected to one another at one end. Owing to the minimum number of spreading jaws, it is possible to exert a relatively uniform radially outwardly acting ring tension by means of the spreading tool during the spreading operation.

Advantageously, the spreading jaws furthermore form at least 7 ring receptacles, each having a different diameter. Owing to such an incremented arrangement of the ring receptacles, multiple spreading processes with different starting diameters of the finger ring that is to be worked on can be carried out successively with the spreading tool, without having to change spreading tools.

Furthermore, the above stated aim is achieved by a spreading device having a spreading tool of one of the aforementioned embodiments and a spreading body capable of being pressed into the receiving space created by the spreading jaws, a bearing unit being provided for detachable fastening of the spreading tool. This allows a large number of spreading tools to be used on the spreading device, thereby in turn enabling the spreading device to be used for working on a very large number of finger rings of different inside diameters and/or shapes of the inside surfaces.

In a further advantageous embodiment of the spreading device, the spreading tool is capable of being fixed in a vertical orientation on the bearing unit. This allows a particularly comfortable placement of a finger ring to be worked on, on the respective correspondingly sized ring receptacle.

In a further advantageous embodiment, the spreading tool has on a bearing end opposite the free end of the spreading jaws a bearing collar, the bearing unit in turn having a threaded sleeve by means of which the bearing collar can be fastened with screws to the remaining spreading device. In this way, a particularly simple and comfortable assembly or disassembly of the spreading tool is made possible, thus ensuring easy exchangeability thereof.

The stated aim is further achieved by a method for producing a hollow ring using a spreading device of one of the aforementioned embodiments, wherein a first ring portion and a second ring portion slipped thereon, of the hollow ring to be produced are placed into one of the ring receptacles of the spreading tool, and the first ring portion is pressed into the second ring portion by pressing the spreading body into the receiving space created by the spreading jaws. Owing to the relatively uniformly distributed pressure that can be applied by the spreading tool onto the first ring portion, same can be pressed into the second ring portion with particular precision.

It is particularly advantageous if interlocking means are provided on an outer surface of the first ring portion, which interlocking means are brought into engagement with mating interlocking means provided on an inner surface of the second ring portion while the first ring portion is being spread open, resulting in a particularly stable connection of both ring portions while forming a substantially fully enclosed cavity.

As a result, the hollow ring produced in this manner has a relatively large-volume outer appearance that can be achieved, however, using a relatively small amount of material. As a result, the ring can have a relatively low weight despite the large volume thereof, and thus have a higher degree of wearing comfort.

In a preferred embodiment of the jewelry ring according to the invention it is provided that, on an outside of the inner body, at least one inner cavity is recessed into the inner body and an inner interlocking means having at least one inner stop is formed that is capable of being joined in an interlocking manner to the outer stop of the outer interlocking means by means of a spreading-force acting upon the inner body. Joining is effected solely by the plastic deformation of the inner body effected by means of the spreading-force, during which plastic deformation an interlocking connection between the at least one inner stop of the inner interlocking means to the outer stops of the outer interlocking means, such that no welding or soldering is needed in order to permanently fix both bodies in place.

Additionally, in a preferred embodiment of the invention, at least one support for stabilizing the outer body with respect to external forces is provided, which is preferably formed circumferentially along an inside of the outer body. Owing to this support being formed within the cavity, the outer body can be protected effectively against external applications of force. Additionally, as a result, the outer body has adequate stability and in some points thereof adequate material strength to put stones and similar decorating elements on the outside thereof.

Further advantageous embodiments of the jewelry ring according to the invention will become apparent from the subclaims and from the description below.

An example embodiment of the invention is illustrated in the Figures, in which:

FIG. 1 shows a perspective view of a spreading device according to the invention,

FIG. 2A shows a perspective view of a hollow ring that can be produced using the spreading device according to FIG. 1, in the joined state,

FIG. 2B shows a perspective view of the hollow ring in the separated state,

FIG. 3 shows a perspective view of a spreading tool according to the invention with a hollow ring placed thereon,

FIG. 4 shows a section through the spreading tool according to FIG. 3,

FIG. 5A shows a section through the spreading tool at the beginning of a spreading operation,

FIG. 5B shows a section through the spreading tool during a spreading operation,

FIG. 5C shows a section through the spreading tool after completion of a spreading operation,

FIG. 6 is a perspective view of an inner and an outer body of a preferred embodiment of the ring according to the invention, in the separated state,

FIG. 7 shows a perspective view of the ring according to FIG. 6 in the joined state,

FIG. 8 shows a view of a structural shape of the outer body according to FIG. 6,

FIG. 9 shows a view of a structural shape of the inner body according to FIG. 6,

FIG. 10 shows a view of the structural shapes of the outer and inner bodies according to FIGS. 8 and 9, in the joined state

FIG. 11 shows a view of a structural shape of an alternate embodiment of the outer body, wherein a receptacle for a stone is provided,

FIG. 12 shows a view of a structural shape of a ring with the outer body according to FIG. 11 and a stone received thereon,

FIGS. 13 a-h each show a view of a structural shape of a plurality of alternate embodiments of the ring according to the invention,

FIG. 14 shows a view of a structural shape of an inner body for producing a ring according to the invention having a plurality of outer bodies, and

FIGS. 15-17 each show a view of a structural shape of a plurality of alternative embodiments of the ring according to the invention having different surface designs.

FIG. 1 shows a spreading device 2 having a spreading tool 4 exchangeably mounted via a threaded sleeve 6 of a bearing unit 8 on the remaining spreading device 2. The spreading tool 4 in this case has six spreading jaws 10 forming, on a bearing end 12, a bearing collar 14, behind which a sleeve collar 16 of the threaded sleeve 6 engages. The spreading device 2 further has a gear unit 18 activated by means of a lever 20.

The spreading device 2 is used for producing a hollow ring 22 in the form of a jewelry finger ring according to FIG. 2A. As can be seen in particular from FIG. 2B, same initially has an inner ring portion 24 and an outer ring portion 26 that can be permanently joined to one another to form a hollow ring.

For that purpose the inner ring portion 24 has interlocking means 28 formed by two circumferential inner stops on the face side and cooperating with mating interlocking means 30 of the outer ring portion 26 that are formed by two circumferential outer end stops on the face side.

The mating interlocking means 30 bound an inside diameter that is dimensioned relative to an outside diameter defined by the interlocking means 28 such that the outer ring portion 26 can just barely be slipped onto the inner ring portion 24. Preferably, the interlocking means 28 are matched in size to the mating interlocking means 30 such that the inner ring portion 24 is supported in a positionally stable manner on the outer ring portion 26 by virtue of restoring forces produced when the outer ring portion 26 is slipped on.

In this state the inner ring portion 24 and the outer ring portion 26, as shown in FIG. 3, are jointly placed onto on the spreading tool 4.

Receiving of the ring portions 24, 26 that are disposed one on the other takes place in one of eight ring receptacles 32 created by the spreading tool 4 on an outside 34 thereof. Each ring receptacle 32 is formed by wall sections 36 of the spreading jaws 10, the wall sections 36 each being disposed at the same height and having recessed therein a concave groove 38. In this way the individual ring receptacles 32 of the spreading tool 4 are each formed circumferentially groove-shaped, and thus are partially bounded by the spreading jaws 10 with respect to a main axis A defined by the spreading jaws 10, not only radially inwardly, but also on both sides in the axial direction R.

As can be seen from FIG. 4, each ring receptacle 32 forms on a side closest to a free end 40 of the spreading tool 4 a diameter Dn (01; 02; 03; etc.). These diameters Dn of the individual ring receptacles 32 decrease incrementally toward the free end 40.

Additionally, the grooves 38 of all of the ring receptacles 32 have a similarly shaped grooved bottom 42 adapted to a desired shape to be produced, of an inner surface 46 of the inner ring portion. In the illustrated embodiment of the spreading tool 4, the groove bottoms 42 have an example circular-segment-shaped section 44 that preferably defines a radius r of less than 25 mm, in particular 22 mm.

The spreading operation proceeds as follows, according to FIGS. 5A to 5C:

The spreading tool 4 supported on the remaining spreading device 2 bounds with the insides 48 of the spreading jaws 10 a substantially truncated cone-shaped receiving space 50. The spreading jaws may be designed as one-piece units, adjacent spreading jaws 10 each being separated from one another by a gap and connected to one another only via the bearing collar 14 which, in this case, is formed continuously annular and from which all of the spreading jaws 10 protrude. Alternatively, the spreading jaws 10 may also be formed separately from one another, in which case they are each connected to a segment of the bearing collar 14 and the bearing collar 14 is formed by the circumferential arrangement of the segments.

In both cases the receiving space 50 is formed at least in some regions thereof complementary to a spreading body 52 of the spreading device 2, the spreading body 52 being movable along the main axis A by actuation of the gear unit 18 by means of the lever 20.

As shown in FIG. 5A, at the beginning of the spreading operation, the spreading body 52 projects into the receiving space 50 only far enough to where it does not yet exert any force onto the insides 48, or onto the ring portions 24, 26 received in the ring receptacle 32.

Pivoting the lever 20 as shown in FIG. 5B activates the gear unit 18, causing the spreading body 52 to be moved upwardly along the main axis A into the receiving space 50, pressing against the inside 48 of the spreading jaws 10 in the process. As a result, same are pushed radially outward and as a result press with circumferential pressure onto the inner surface 46 of the inner ring portion 24, such that same is pressed, while being plastically deformed, into the outer ring portion 26.

In the process, the spreading body 52 is moved far into the receiving space 50 until the interlocking means 28 of the inner ring portion 24 have been moved into a predetermined end position relative to the mating interlocking means 30 of the outer ring portion 26 in which an interlocking fit that is free from play in all directions according to FIG. 5C is created between both ring portions 24, 26, and as a result the completed hollow ring 22 according to FIG. 2A is available.

The lever 20 is then pivoted back into the starting position according to FIG. 5A, in which the completed hollow ring 22 (according to FIG. 2A) can be removed from the respective ring receptacle 32.

Afterwards a next hollow ring 22 can then be produced optionally using another ring receptacle 32 of the spreading tool 4 installed or after removal thereof and installation of another spreading tool 4 on the bearing unit 8.

FIGS. 6 to 11 show a preferred ring 101 produced using the method described above that has a high degree of stability and requires no solder for the production thereof. The ring 101 is hollow, thus forming a large volume despite the use of relatively little raw material. For that purpose the ring 101 has an outer body 102 that is shaped substantially cylindrical. On both ends of the outer body 102 at least one stop 121 of an interlocking means is provided.

In order to design the outer body 102 to be more resistant to external impacts, at least one, preferably circumferential, support 122 is provided thereon. The outer body bounds a cavity 123 into which the support 122 projects. Furthermore, the ring has an inner body 103 that is capable of being received in or is mounted in the interior of the outer body 102. The support 122 is disposed in the interior of both bodies 102, 103.

Additionally, at least one stop 131 of an inner interlocking means is provided on each outer end of the inner body 103, the inner body 103 forming on the outside thereof also at least one cavity 132.

In the preferred embodiment of the invention, the outer body 102 is either a ring or a hollow cylinder which, after placement onto a finger, represents the substantially only visible part of the ring. The surface of the outer body 102 may be processed using any desired technique and may be provided with any desired design.

On both sides of the inside of the outer body 102, the respective stop 121 ensures that the outer body 102 and the inner body 103 are held together. The outer stops 121 are preferably mounted on the inner side of the outer body 102 and, in the preferred embodiment of the invention, are formed annular on the ends of the inside of the outer body 102 and may be formed coaxial with the remaining body 102. Preferably, the outer stops 121 are formed integrally with the outer body 102.

The preferably circumferential support 122 increases the strength (second moment of area) of the outer body 102 and results in the outer body 102 being more resistant to impacts acting on the ring 101 from the outside. In this manner the stability of the outer body 102 is increased from the inside thereof by the support 122 in the style of a support beam. In a preferred embodiment of the invention, the support 122 is arranged precisely in the middle in the interior of the outer body 102 and is formed as a ring or hollow cylinder that is coaxial with the outer body 102.

In an alternative embodiment of the invention, the support 122 is formed in the interior of the outer body 102 and coaxially parallel therewith as a stop in different planes.

In one embodiment of the invention, the support 122 is formed by at least one shape jutting out from the concave or from the concavely graduated inside of the outer body 102 (see FIG. 8).

In another embodiment of the invention, the support 122 projects out from a flat inside of the outer body 102, the support 122 being shaped cylindrical or having a triangular or square structural shape (see FIG. 10).

In a further alternative embodiment of the invention, the support 122 is formed in the interior of the outer body 102 in any desired geometric shape and arrangement relative to the remaining outer body 102. In the regions in which the support 122 is present, the at least one outer body 102 is formed so as to have the maximum material strength. The support 122 in this case additionally serves to enable stones T or other materials to be firmly mounted on the surface of the outer body (see FIGS. 11 to 13). In the stone receptacle 124 that is recessed into the outer body 122, the respective stones T or other materials can be borne firmly and reliably owing to the support 122.

Furthermore, at least one cavity 123 is formed in the interior of the outer body 102, so as to be able to save material. The volume of the cavity 123 of the outer body 102 may be formed virtually as large as desired. If the volume of the cavity 123 of the outer body 102 is formed to be relatively large, one obtains an overall relatively light-weight ring. A continuous cavity 123 or, alternatively, a plurality of, for example, symmetrically arranged cavities 123 may be formed on the outer body 102 for this purpose.

The inner body 103 is formed in such a way that it closes off the outer body 102 and, in the process, covers the support 122 arranged in the interior thereof and the cavity 123 thereof, thereby providing the ring 101 with a voluminous appearance. To achieve this, the inner body 103 is arranged in the interior of the outer body 102 and is formed either as a ring or as a hollow cylinder.

The inner stops 131 of the inner interlocking means are formed on the outer surface of the inner body 103 and serve to be fixed in place on the outer stops 121 of the outer body 102. In a preferred embodiment of the invention, the inner stops 131 are formed annular. On the surface of the inner body 103, same preferably has two cylindrical inner stops 131. For these inner stops 131, the sides facing mutually away from one another are denoted by Y (see FIG. 9). The distance between these sides Y is denoted by B. The sides of the outer stops 121 facing one another are denoted by X (see FIG. 8). The distance between these sides X, which each also face toward the support 122, are denoted by A and are smaller than B.

The cavity 132 of the inner body 103 is formed in order to save material. The volume of the cavity 132 of the inner body 132 can be expanded virtually as desired. When the volume of the cavity of the inner body 132 is expanded, one obtains a relatively more light-weight ring. A continuous cavity 132 may be formed on the inner body 103 as well. However, a plurality of cavities 132, for example disposed in parallel, can be provided as well.

The inner body 103 and the stops 131 thereof are produced such that the outer diameter of the inner stops 131 is smaller than the outer diameter of the outer stops 121 disposed on the outer body 102. The inner body 103 is inserted coaxially into the interior of the outer body 102 and radially outwardly directed pressure is then exerted onto the inner surface of the inner body 102. By means of this pressure, the inner body 103 and the stops 131 thereof are plastically deformed, as a result of which the cross section of the inner body 103 and of the inner stops 131 is enlarged on the inside and outside. The pressure that is exerted onto the inside of the inner body 103 is continued until the diameter of the stops 131 of the inner interlocking means exceeds that of the outer stops, such that the inner stops 131 are in interlocking engagement with the outer stops 121.

After this plastic deformation of the inner body 103, both bodies 102, 103 are joined to one another and can no longer be separated. Depending on the magnitude of the difference between the distances A and B and depending on the respective tolerances, the inner body 103 and the outer body 102 are joined to one another such that they are either completely fixed one to the other or that they can be rotated relative to one another in the axis of the outer body 102.

If the difference between the distances A and B is relatively large, the inner body 103 can rotate in the axis of the outer body 102. If the difference between the distances A and B is very small, the inner stops 131 and the outer stops 121 are firmly joined to one another, thereby preventing a relative movement of the inner body 103 with respect to the outer body 102.

In one embodiment of the invention at least one second support 122 is provided on the outside of the inner body 103, so as to further stabilize the ring 101 (see FIG. 14). The second support is preferably mounted on the outside of the inner body 103 and is formed continuous, like a ring or a hollow cylinder, and is preferably disposed in the middle of the inner body 103.

In a further embodiment, the second support 122 is formed by a small stop that extends, for example, along the axis of symmetry of the inner body 103.

The support 122 or the second support 122 can be as high or as thick as desired.

In a further embodiment of the invention according to FIGS. 14 and 15, two inner stops 131 and five supports 122 are formed, for example.

In another embodiment of the invention, according to FIGS. 16 and 17, two inner stops 131 and seven supports 122 are provided.

The terminating rings 104 each have a locking receptacle 141, in which the inner stops 131 of the inner body 103 are received in order to join the terminating rings 104 to the inner body 103. As a result, the outer bodies 102 disposed on the inner body 103 are held together as well.

The volume of the locking receptacles 141 and the volume of the inner stops 131 can be the same. However, the volume of the locking receptacle 141 can also be larger than the volume of the inner stops 131.

The outer bodies 102 are rings that have been produced from materials that are different or the same, that have a same or a different shape or surface and/or that otherwise have a same or different design. The outer bodies 102 can give the ring 101 a different design depending on the order in which they are disposed. Additionally, the outer bodies 102 that are each cut from a tube, can have different geometries.

The subject matter of the invention is not limited by the above embodiments, but can be varied further, according to the personal desires. 

1. A spreading tool (4) for widening a jewelry ring, in particular for pressing an inner ring portion (24) into an outer ring portion (26) of a hollow ring (22), having a plurality of spreading jaws (10), the insides (48) of which bound a receiving space (50), into which a spreading body (52) can be inserted for spreading open the spreading jaws (10), and which form on the outsides (34) thereof a plurality of coaxial ring receptacles (32) each being bounded radially inwardly by circumferentially disposed wall sections (36) of the spreading jaws (10), wherein the ring receptacles (32) have diameters (Dn) that decrease relative to one another toward a free end (40) of the spreading jaws (10), characterized in that the spreading jaws (10) bound the ring receptacles (32) on both sides also in the direction of a main axis (A).
 2. A spreading tool according to claim 1, characterized in that the ring receptacles (32) are bounded by adjacently disposed concave grooves (38) that are recessed into the circumferentially disposed wall sections (36).
 3. A spreading tool according to claim 2, characterized in that the concave grooves (38) each have a groove bottom (42) that forms a circular-segment-shaped section (44) in cross section.
 4. A spreading tool according to claim 3, characterized in that the circular-segment-shaped section (44) defines a radius of less than 25 mm.
 5. A spreading tool according to claim 1, characterized in that the ring receptacles (32) are bounded by at least six circumferentially disposed spreading jaws (10).
 6. A spreading tool according to claim 1, characterized in that the spreading jaws (10) form at least seven ring receptacles (32) having different diameters (Dn).
 7. A spreading device (2) having a spreading tool (4) according to claim 1 and a spreading body (52) capable of being pressed into the receiving space (50) created by the spreading jaws (10), characterized in that a bearing unit (8) for detachable fastening of the spreading tool (4) is provided.
 8. A spreading device according to claim 7, characterized in that the spreading tool (4) is capable of being fixed in a vertical orientation on the bearing unit (8).
 9. A spreading device according to claim 7, characterized in that the spreading tool (4) forms on a bearing end (12) opposite the free end (40) of the spreading jaws (10) a bearing collar (14) and that the bearing unit (8) has a threaded sleeve (6) by means of which the bearing collar (14) can be fastened with screws to the remaining spreading device (2).
 10. A method for producing a hollow ring (22) using a spreading device (2) according to claim 1, characterized in that a first ring portion (24) and a second ring portion (26) slipped thereon of the hollow ring (22) to be produced are placed into one of the ring receptacles (32) of the spreading tool (4) and the first ring portion (25) is pressed into the second ring portion (26) by pressing the spreading body (52) into the receiving space (50) created by the spreading jaws (10).
 11. A production method according to claim 10, characterized in that interlocking means (28) are provided on an outer surface of the first ring portion (24), which interlocking means (28) are brought into engagement with mating interlocking means (30) of the second ring portion (26) while the first ring portion is being spread open (24).
 12. A jewelry ring (101) produced in a method according to claim 10, having at least one outer body (102) od cylindrical shape, at least one inner body (103) capable of being inserted into the interior of the outer body (102), an outer interlocking means that forms on both ends of the outer body (102) at least one outer stop (121), at least one outer cavity (123) of the outer body (102) recessed into an inside of the outer body (102), wherein on an outside of the inner body (103) at least one inner cavity (132) is recessed into the inner body (102) and an inner interlocking means having at least one inner stop (131) is formed that is capable of being joined in an interlocking manner by means of a spreading-force being exerted onto the inner body to the outer stop (121) of the outer interlocking means.
 13. A jewelry ring according to claim 12, characterized in that at least one support (122) for stabilizing the outer body (102) with respect to external forces is provided.
 14. A jewelry ring according to claim 12, characterized in that the outer body (102) has on the outside thereof a design or a pattern.
 15. A jewelry ring according to claim 12, characterized in that the outer stops (121) are formed coaxial to the remaining outer body (102).
 16. A jewelry ring according to claim 12, characterized in that the outer body (102) and the outer stops (121) are formed integrally.
 17. A jewelry ring according to claim 13, characterized in that the support (122) on the inside of the inner body (103) is disposed symmetrically, offset or inclined circumferentially with respect to same and the outer stops (121).
 18. A jewelry ring according to claim 13, characterized in that the outer body (102), the stops (121) formed on the inside thereof, and the at least one support (122) are formed so as to be coaxial.
 19. A jewelry ring according to claim 13, characterized in that the support (122) formed on the inside of the outer body (102) is formed cylindrical, square or triangular.
 20. A jewelry ring according to claim 13, characterized in that the inside of the outer body (102) is formed concave and that the at least one support (122) is disposed thereon.
 21. A jewelry ring according to claim 12, characterized in that the inner body (103) is formed annular and coaxial to the at least one inner support (131).
 22. A jewelry ring according to claim 12, characterized in that in order to stabilize both the outer body (102) and the inner body (103) at least one second support (122) is additionally also provided on the outside of the inner body (103).
 23. A jewelry ring according to claim 22, characterized in that the second support (122) is disposed in a cylindrical cavity recessed into the outside of the inner body (103).
 24. A jewelry ring according to claim 22, characterized in that the second support (122) is disposed on the outside of the inner body (103) symmetrically, offset or inclined circumferentially relative to same.
 25. A jewelry ring according to claim 22, characterized in that the second support (122) formed on the outside of the inner body (103) is formed cylindrical, square or triangular.
 26. A jewelry ring according to claim 22, characterized in that the outside of the inner body (103) is formed concave, and that the at least one second support (122) is disposed thereon.
 27. A multi-part jewelry ring including at least one jewelry ring according claim 12, comprising: a hollow, cylindrical inner body (103), at least two terminating rings (104) each mounted onto the inner body (103) on an end thereof, at least one outer body (102) mounted between the two terminating rings (104) onto the inner body (103), at least one inner cavity (132) of the inner body (103) recessed into the inner body (103), at least one cavity (123) of the outer body (102) recessed into the outer body (102), wherein the inner interlocking means has on both ends thereof at least one inner stop (131) for affixing the terminating rings (104).
 28. A multi-part jewelry ring according to claim 27, characterized in that the inner body (103), in order to prevent contact of the ends with a finger, has on the inside thereof between both ends a convex shape.
 29. A multi-part jewelry ring according to claim 27, characterized in that the terminating rings (104) surround the ends of the inner body (104) and are each firmly connected to an inner stop (131) of the inner interlocking means, and on the inner body (103) parallel to the inner stops (131) at least one support (122) is provided to form voids between the outer body (102) and the inner body (103), in order to reduce the weight of the ring.
 30. A multi-part jewelry ring according to claim 27, characterized in that the outer bodies in cross section (102) have any desired geometric shape.
 31. A multi-part jewelry ring according to claim 27, characterized in that the outer bodies are supported on the inside and are thereby secured against forces acting from the outside and against rotation that would be annoying to the user. 